20 multiple-choice questions in College Board exam style. Each has four choices and a full explanation of why each option is right or wrong.
Read the question carefully before looking at the choices. Many AP Macro questions have answers that look almost identical; small wording differences (movement vs. shift, absolute vs. comparative advantage) matter.
Eliminate before guessing. AP Macro distractors often describe a real concept that just doesn't answer the question being asked. Cross out anything irrelevant first.
If a price changes, think movement. If anything else changes, think shift. This distinction is the most-tested idea in Unit 1.
Read the explanations even when you got it right. Each one teaches a small fact that often returns in a different form on the exam.